Edmund mebedith



(N0 Model.)

E. MEREDITH.

HEATER PoR SOLDBRING IRoNs.

No. 267,560. Patented Nov. 14, 1882.

WI T/VESES i N, PETERS. mammogram, wnmngam uc,

UNTTEDV STATES PATENT Orifice,

EDMUND MEREDITH, OF PHILADELPHIA, PENNSYLVANIA, `ASSIGrNOR TO THE ELKINS MANUFACTURING AND GAS COMPANY, OF SAME PLACE.

HEATER FOR SOLDERlNG-IRONS.

SPECIFICATION forming part of Letters Patent No. 267,560, dated November 14, 1889. Applicationvtiled August 10, 1882. (No model.)

To all whom it may concern:

Be it known that I, EDMUND MEREDITH, a citizen ofthe United States, and a resident of Philadelphia, Pennsylvania, have invented an Improvement in Heaters for Soldering-Irons,

&c., ot' which the following is a specification.

My invention relates to certain improvements in that class of heaters in which gas or a mixture of gas and air is used for fuel, and

1o in which the flow ofthe gas or mixture is regulated by the introduction and withdrawal of the soldering-iron or other tool to be heated, my improvements comprising certain details in the construction ot' a heater of this class with the view of simplifying thevsame, and providing for its economical working under all circumstances.

In the accompanying drawings, Figure l is a vertical section of my improved solderingzo iron heater; Fig. 2, a sectional plan view of the saine, Fig. 3, a transverse section 5 Figs. 4

and 5, views of the valve for governing` the tiow of gas and air to the heater, and Figs. 6,

7, and 8, views of a modied form of valve.

The casing of the heater comprises in the presentinstancetwo tubes, A, secured together side by side, although it should be understood in the outset that my invention is not limited to'the use of two tubes, as but one tube or 3o more than two may be used,if desired. Each tube A is closed at the rear bya suitable head, to which is secured and from which projects a pipe, B, these pipes being connected by apipe, B', provided with a branch, c, communicating n through a hose or other connection with areservoir of. air under pressure. With the pipe B also communicates a gaspipe, b, having two branches, each suitably valved,so that the flow of gasto either pipe B can be readily regulated.

In each pipe B is a nozzle, d, which serves to contract the volume of air and gas flowing through the pipe, so as to cause the same to be projected into the tube A in the form of a jet with force suftcient to carryit through and beyond the tube. The iiow of air and gas through each pipe B is regulated by a valve, D, consisting of a plain cylindrical stem, j', adapted to slide in ai vertical branch, g, of the 5o pipe, and having two reduced portions, h and latter aplate, p.

m, the former being but slightly reduced in diameter, but the portion m being reduced to a greater extent. The lower end of the stem f of each valve projects beyond the lower end ot' the branch g, and is acted upon by thelong arm of a lever, F, hung to a stud on the tube A, the short arm of the lever being acted upon by a pin, n, projecting' through an opening in the bottom of the tube, and having within the rlheleverFissimplyadapted 6o to slots in the pin n and valve-stemf, so as to permit the ready disconnection of the valve and pin when desired.

To the rear portions oi' the tubes A are adapted internal casings, Gr, and between the latter and the said tubes'A are interposed tillings s, of plaster-of-paris, tire-clay, or other nonconducting material.

The operation ofthe apparatus is as follows:

A soldering-iron or other tool is inserted into 7o the iront end ot' the tube A, so as to restupon the plate p, and thereby depress the same and its pin n, so as to operate the lever F and elevate the valve D, the reduced portion m of the latter being brought in line with the pipe B, as shown in Fig. l. This permits a free iiow of gas and air around the valve, through the nozzle d, and into the tube A,in which it is ignited, so as to produce a iiame which plays around the point of the iron, the latter being 8o inserted into the casing G. When the iron, after being sufficiently heated, is removed from the tube A, the weight of the valve D causes the same to drop, so as to bring the reduced portion 7L into line with the pipe B, as shown 85 in Fig. 4, a stop, t, on the lever F preventing the further descent of the valve. The passage through the pipe B is now contracted to such an extent that only a small volume of air and gas can pass through the pipe, this vol- 9o ume being suiiicient to maintain a slight flame at the end of the pipe until the iron or other tool is again inserted and the valve D opened,

as in Fig. l.

In some cases itis not couvenientto provide a supply ot' air under pressure for admixture with the gas, and in such cases I propose to work the apparatus on the principle of the Bunsen burner, the jet of gas from the nozzle d inducing air to enter the pipe B for admixturc with 10o the gas. For this purpose Iforin in each pipe B adjacent to the nozzle d an opening, tu, which can be opened or closed by a sliding valve,.r, so as to permit air in any required quantity to enter the tube, or to cut of the supply of air, as may be desired.

In the workingof the apparatus it occasionally becomes desirable to lessen the flow of air and gas through the pipes B, without cut-ting ott' the same to such an extent as would follow the closing of the valve D, as shown in Fig. 4. Hence I provide the reduced portion m of the valve with a laterally-projecting wing, yi, as shown in Figs. 2 and 5. \Vhen this wing is adjusted to a position in line with the pipe B, as shown in the upper part of Fig. 2, it does not otfer any obstruction to the free `flow of airand gas through the pipe and past the valve; but when the valve is turned quarter-way around, as shown in the lower portion of Fig. 2, the wing closes one-halfof the passage, and restricts the volume of air and gas passing' through the pipe.

In order to permit the adjustment of the valve to either of the positions shown in Fig. 2, the lower end of the valve-stein has two slots, y, at right angles to each other, for the recep tion of the long arm of the lever F.

Instead of reducing the diameter of the valvesten1 j'ath and m, as described, passages may be formed through the valve at these points, the portion m having two passages at right angles to each other, and of different area, as set forth. (See Figs. 6, 7, and S.)

I claim as my inventionl. The eomhination,in a heater for solderingirons or other tools, ot' a tube, A, a pipe, B, a

valve, D, controlling the flow through said pipe, a tool-supporting platein the tube A, and a lever, F, forming a connection between said tool-supporting plate and the valve D, as set forth.

2. rlhe combination of the pipe B with a valve, D, having portions hl and m, presenting passages of different area, said valve being adj ustable in respect to the pipe, whereby either passage may be caused to provide communication through the pipe, as set forth.

3. The combination of the pipe B with a valve, D, having a portion, m, constructed as described, so as to present passages at right angles to each other, but of different area, as set forth.

4. rlhe combination of the pipe B with a sliding valve, D, having portions ll. and m, red need in diameter, the portion fm being reduced to a greater extent than the portion h, as set forth.

5. The combination of the pipe B, the lever F, and the valve D, having unequal passages at right angles to each other, and right-angled slots y, adapted for the reception of the lever, as set forth.

6. The combination of the tube A and lever F with the slotted pin u and its plate p, as set forth. y

In testimony whereof I have signed my name to this specification in the presenceoftwo subscribing witnesses.

EDMUN I) M EREDITII.

IVitnesses: Y

HARRY DRURY, HARRY SMrrH. 

